Thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply

A thermodynamic cycle system and mixed working medium technology, applied in the energy field, can solve the problems of large heat transfer temperature difference and large heat transfer temperature difference of rectification column reboiler

Inactive Publication Date: 2012-10-10
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0015] In order to overcome the shortcomings of the existing medium and low temperature waste heat utilization methods, the present invention proposes a thermodynamic cycle system and method for combined power and cold supply of ammonia water mixed working medium to solve the problem of large heat transfer temperature difference of the rectification tower reboiler

Method used

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  • Thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply
  • Thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply
  • Thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply

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Embodiment 1

[0051] Table 1 (embodiment 1 and embodiment 2)

[0052] Assuming that the system is in steady state operation, see Table 2 to Table 5 for the calculation results of logistics simulation under equilibrium conditions and the comparison of thermal performance between the cogeneration system and the separate production system. Table 2 and Table 4 are the state parameters of the cycle balance working conditions of Embodiment 1 and Embodiment 2 respectively, and Table 3 and Table 5 are respectively the thermal performance comparisons of Embodiment 1 and Embodiment 2 with the corresponding production division systems.

[0053]

[0054]

[0055]

[0056] Table 2 (embodiment 1)

[0057]

[0058] Table 3 (embodiment 1)

[0059]

[0060]

[0061]

Embodiment 2

[0063]

[0064] Table 5 (embodiment 2)

[0065] As can be seen from Table 3, the system thermal efficiency and exergy efficiency of Embodiment 1 of the present invention are respectively 40.72% and 42.46%, which are respectively 46.2% and 46.82% higher than the production system thermal efficiency and exergy efficiency; Under the condition of energy saving, the energy saving rate of the system in embodiment 1 is 31.6%.

[0066] As can be seen from Table 5, the system thermal efficiency and exergy efficiency of embodiment 2 of the present invention are respectively 35.85% and 44.63%, which are respectively 36.2% and 36.7% higher than the production system thermal efficiency and exergy efficiency; Under the condition of energy saving, the energy saving rate of the system in embodiment 2 is 26.6%.

[0067] Compared with the reference system, the thermodynamic performance of the cogeneration system provided by the present invention is greatly improved, and the fundamental reas...

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Abstract

The invention discloses a thermodynamic cycle system and method for ammonia water mixed working medium power cooling combined supply. Ammonia water mixture serves as a working medium, and medium-and-low temperature heat serves as a heat source; the thermodynamic cycle system includes a power cycle and a refrigerating cycle; and the power cycle taking the ammonia water mixture as the working medium, the characteristic of temperature-variable evaporation of the working medium is utilized to be excellently matched with a sensible heat source, meanwhile, the temperature-variable condensation of the working medium is utilized to provide heat for the re-boiling process of a tower kettle and the preheating process for partial feeding material of a rectifying tower of the refrigerating cycle. Through the system integration, the high-temperature part of the external heat source is utilized for power cycle, the low-temperature part of the external heat source and the heat extraction of the power cycle are utilized for the refrigerating cycle, the matched temperature and stepped utilization of heat are realized, and compared with the typical dividing system, the performance of the system is improved.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to a thermodynamic cycle system and method for a mixed working fluid combined power and cooling supply using ammonia-water mixture as a working fluid. Background technique [0002] my country's industrial energy consumption accounts for about two-thirds of the country's total energy consumption, but energy utilization efficiency is low, and more than 50% of it is discharged in the form of medium and low temperature heat, which not only causes energy waste, but also causes thermal pollution to the environment. Recycling these waste heat plays a significant role in improving my country's energy utilization efficiency. The ammonia water absorption refrigeration cycle, the ammonia water power cycle, and the combined power and cooling cycle system combining the ammonia water absorption refrigeration and power cycle are typical thermodynamic cycle systems that can utilize low-temperature ...

Claims

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Application Information

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IPC IPC(8): F25B15/04F01K7/00
CPCY02B30/62Y02A30/27
Inventor 金红光韩巍孙流莉郑丹星杨金福崔平
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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